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Finding the Fourth Proportional to 91,093.59, 135,724.50 and 86,000.63

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Solution

The fourth proportional to 91,093.59, 135,724.50 and 86,000.63 is: 128,136.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,093.59 : 135,724.50 = 86,000.63 : x
  2. Step 2: Convert to fraction form
    91,093.59/135,724.50 = 86,000.63/x
  3. Step 3: Cross multiply
    91,093.59x = 135,724.50 × 86,000.63
  4. Step 4: Simplify right side
    91,093.59x = 11,672,391,827.81
  5. Step 5: Solve for x
    x = 11,672,391,827.81/91,093.59
  6. Step 6: Final answer
    x = 128,136.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.